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Электронный компонент: SDA4331

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P-DSO-24-1
Semiconductor Group
1
04.96
PLL with
I
2
C Bus for AM/FM Receivers
SDA 4331X
Frequency resolution of 1, 5 and 10 kHz AM and 12.5, 25 and 50 kHz FM
P-DSO-24 package
1.2
Application
The SDA 4331X provides separated input and output ports for AM and FM and is well
suited for extremely fast loop settling times in the FM mode.
Type
Ordering Code
Package
SDA 4331X
Q67100-H5139
P-DSO-24-1
1
Overview
1.1
Features
155 MHz FM and 40 MHz AM input frequency
30 mVeff AM and 50 mVeff FM sensitivity
Additional open drain ports controlled by
I
2
C Bus
2-pin quartz oscillator
Fast phase detector with short anti-backlash pulses
and polarity reversal
Charge pump current programmable in four steps
up to 4.5 mA
SDA 4331X
Semiconductor Group
2
04.96
1.3
Pin Configuration
(top view)
Figure 1
P-DSO-24-1
SDA 4331X
Semiconductor Group
3
04.96
1.4
Pin Definitions and Functions
Pin No. Symbol
Input (I)
Output (O)
Function
1
V
DD1
Supply voltage digital (5 V)
2
SCL
I
Clock
I
2
C Bus
3
SDA
I/O
Data
I
2
C Bus
4
A0
I
Address selection, sets the LSB of the IC-address
5
N.C.
6 ... 9
SA1 ... SA4 O
10 V open drain output, controlled via
I
2
C Bus
10
AM/FM
O
10 V open drain output, indicating the operation
mode (H = AM)
11
FM
IN
I
Input for the FM signal from VCO
12
GND
AN
Ground analog
13
AM
IN
I
Input for the AM signal from VCO
14
N.C.
15
N.C.
16
I
REF
I
Reference current, setting the base current level
for the charge pumps
17
PD
FM
O
FM charge pump output
18
PD
AM
O
AM charge pump output
19
PD
FMA
O
Source follower output FM
20
PD
AMA
O
Source follower output AM
21
V
DD2
Supply voltage digital for charge pump and source
followers (up to 10 V)
22
OSC
FB
I/O
Oscillator feedback, quartz terminal
23
OSC
IN
I
Oscillator input, quartz terminal, optionally input
for external reference
24
GND
Ground digital
SDA 4331X
Semiconductor Group
4
04.96
1.5
Functional Block Diagram
Figure 2
Block Diagram
SDA 4331X
Semiconductor Group
5
04.96
2
Functional Description
The SDA 4331X is a radio PLL controlled via
I
2
C Bus for frequency synthesis in the AM
and FM range.
3
Circuit Description
The reference frequency for the PLL is derived from the quartz oscillator OSC
1)
. The
R-prescaler can be adapted to quartz frequencies of 4, 8 or 10.25 MHz, respectively,
yielding an internal 50 kHz reference. Programming the R-counter sets the phase
detector reference frequency to 1, 5 or 10 kHz in the AM mode or to 12.5, 25 or 50 kHz
in the FM mode. The VCO frequency is set by programming the A/N-counter which
operates as dual-modulus counter for FM and AM using a divide by 4/5 swallow counter.
The phase detector drives two different charge pumps for AM and FM mode. Additional
source followers are connected to the charge pump. There are four programmable
current levels for each charge pump. The supply voltage for the charge pump and the
source followers is supplied via the
V
DD2
pin and can reach 10 V maximum. AM/FM is an
open drain output as well as the additional outputs SA1 ... SA4 which are controlled by
I
2
C Bus.
The
I
2
C Bus interface provides slave receiver functions. There are two addresses
selected by the A0 pin. The
I
2
C-protocol (see diagram 1) contains one string for
programming all counters and functions. The transfer may be stopped optionally after
each word if the remaining functions are not to be altered. After power ON all control
signals are undefined, so that the complete write sequence must be executed.
1)
The power dissipation of the quartz is given by:
P
v
= 2
R
1
(
f
Q
(
C
O
+
C
L
)
V
DD
)
2
R
1
... Series resistance of the quartz
f
Q
... Quartz frequency
C
O
... Parallel capacitance of the quartz
C
L
... Load capacitance, including input capacitance of the IC
SDA 4331X
Semiconductor Group
6
04.96
4
Electrical Characteristics
Note: Maximum ratings are absolute ratings; exceeding only one of these values may
cause irreversible damage to the integrated circuit.
4.2
Operational Range
Note: In the operating range the functions given in the circuit description are fulfilled.
4.1
Absolute Maximum Ratings
T
A
= 25
C to 85
C
Parameter
Symbol
Limit Values
Unit Remarks
min.
max.
Supply voltage
V
DD1
0.3
6
V
Supply voltage
V
DD2
0.3
10.5
V
Input voltage
V
IN
0.3
V
DD1
+ 0.3 V
Power dissipation per output
P
Q
10
mW
Power dissipation
P
tot
t.b.d.
mW
Storage temperature
T
S
40
125
C
Output voltage SA1 ... SA4, AM/FM
V
QH
10.5
V
ESD voltage (HBM: 1.5 k
, 100 pF)
V
ESD
1
1
kV
Parameter
Symbol
Limit Values
Unit
min.
typ.
max.
Supply voltage
V
DD1
4.5
5
5.5
V
Supply voltage
V
DD2
9
10.3
V
Supply current
I
DD1
4
10
mA
Supply current
1)
I
DD2
0.5
mA
Ambient temperature
T
A
25
+ 85
C
Output voltage SA1 ... SA4, AM/FM
V
QH
V
DD2
V
1)
Measurement conditions: No load on pins 17 ... 20.
SDA 4331X
Semiconductor Group
7
04.96
4.3
AC/DC Characteristics
Parameter
Symbol
Limit Values
Unit
Test Condition
min.
typ.
max.
Input AM
IN
Input voltage
(sine wave)
V
IN
30
mVeff
V
DD1
= 4.5 V
0.5 MHz <
f
IN
< 40 MHz
Input capacitance
C
4
pF
Input current
I
IN
50
50
A
0
V
IN
V
DD1
Input FM
IN
Input voltage
(sine wave)
V
IN
50
120
mVeff
mVeff
V
DD1
= 4.5 V
20 MHz <
f
IN
< 120 MHz
10 MHz <
f
IN
< 155 MHz
Input capacitance
C
4
pF
Input current
I
IN
100
100
A
0
V
IN
V
DD1
Input OSC
IN
Input voltage
(sine wave)
V
IN
100
150
200
mVeff
mVeff
mVeff
V
DD1
= 4.5 V
f
IN
= 4 MHz
f
IN
= 8 MHz
f
IN
= 10.25 MHz
Input capacitance
C
10
pF
Input current
I
IN
30
30
A
0
V
Q
V
DD1
Input/Output SDA
H-input voltage
V
IH
0.7
V
DD1
V
DD1
V
L-input voltage
V
IL
0
0.3
V
DD1
V
L-output voltage
V
QL
0.4
V
I
QL
= 3 mA,
V
DD1
= 5 V,
C
L
= 400 pF
Input leakage current
I
Leakage
10
10
A
0
V
IN
V
DD1
Input capacitance
C
10
pF
SDA 4331X
Semiconductor Group
8
04.96
Inputs SCL, A0
H-input voltage
V
IH
0.7
V
DD1
V
DD1
V
L-input voltage
V
IL
0
0.3
V
DD1
V
Input leakage current
I
Leakage
10
10
A
0
V
IN
V
DD1
Input capacitance
C
10
pF
Outputs SA1, SA2, SA3, SA4, AM/FM (open drain outputs)
L-output voltage
V
QL
V
QL
0.4
0.1
V
V
I
QL
= 1 mA
V
DD1
= 5 V
I
QL
= 0.1 mA
Input
I
REF
Input current
I
IN
t.b.d. 100
t.b.d.
A
Voltage at
I
REF
V
IREF
1.2
V
I
IN
= 100
A
Output PD
FM
PD current A
I
Q
4.5
mA
V
PD
= 4 V
PD current B
I
Q
3
mA
PD current C
I
Q
1.5
mA
PD current D
I
Q
150
A
Output PD
AM
PD current A
I
Q
450
A
V
PD
= 4 V
PD current B
I
Q
300
A
PD current C
I
Q
150
A
PD current D
I
Q
30
A
4.3
AC/DC Characteristics (cont'd)
Parameter
Symbol
Limit Values
Unit
Test Condition
min.
typ.
max.
SDA 4331X
Semiconductor Group
9
04.96
Note: The listed characteristics are ensured over the operating range of the integrated
circuit. Typical characteristics specify mean values expected over the production
spread. If not otherwise specified, typical characteristics apply at
T
A
= 25
C and
the given supply voltage.
Output PD
FMA
H-output voltage
V
QH
7.5
7.7
V
I
QH
= 2 mA
V
PD FM
=
V
DD2
= 9 V
H-output current
I
QH
2
5
mA
V
PD FM
=
V
DD2
= 9 V
L-output current
I
QL
10
A
V
PD FM
= GND
V
Q
= 4 V
Output PD
AMA
H-output voltage
I
QH
1
2.5
mA
V
PD AM
= 5 V
L-output current
I
QL
0.1
mA
V
PD AM
= GND
V
Q
= 5 V
Table 1
Programming of Mode and Frequency Resolution
AM/FM
R1
R0
Mode
Frequency Resolution
[
MHz
]
0
0
1
FM
12.5
0
1
0
FM
25
0
1
1
FM
50
1
0
1
AM
1
1
1
0
AM
5
1
1
1
AM
10
4.3
AC/DC Characteristics (cont'd)
Parameter
Symbol
Limit Values
Unit
Test Condition
min.
typ.
max.
SDA 4331X
Semiconductor Group
10
04.96
Table 2
Programming R-prescaler
RP1
RP0
Divide Ratio
Quartz Frequency
[
MHz
]
0
0
1:1
Test mode only
0
1
1:80
4
1
0
1:160
8
1
1
1:205
10.25
Table 3
Programming Phase Detector
PD1
PD0
Current Level
PPD
Polarity
0
0
D
0
Normal
0
1
C
1
Invers
1
0
B
1
1
A
Table 4
Programming Test Mode
T1
T2
SA1
SA2
SA3
SA4
T3 Operation
0
0
Controlled by
I
2
C Bus
0
Normal
1
0
PD_MUX
Clk_50 kHz N_A_CLN
1
Test reset
SDA 4331X
Semiconductor Group
11
04.96
Diagram 1:
I
2
C Protocol
[
STOP or START
]:
Optional STOP or START condition, after power ON
the complete sequence has to be programmed.
Slave-receive (Write)
START
1
1
0
0
1
0
0/1
0
ACK
MSB
N14
N13
N12
N11
N10
N9
N8
ACK
N7
N6
N5
N4
N3
N2
N1
LSB
ACK
[
STOP or START
]
AM/FM
PD1
PD0
IF
SA4
SA3
SA2
SA1
ACK
[
STOP or START
]
G1
G0
F0
R1
R0
RP1
RP0
0
ACK
[
STOP or START
]
PPD
T0 (= 0)
T1 (= 0)
T2 (= 0)
T3 (= 0)
X
X
X
ACK
STOP or START
A/N-counter
SDA 4331X
Semiconductor Group
12
04.96
Figure 3
Application Circuit for AM and FM Charge Pump Output
SDA 4331X
Semiconductor Group
13
04.96
5
Package Outlines
P-DSO-24-1
(Plastic Dual Small Outline Package)
GPS05144
Sorts of Packing
Package outlines for tubes, trays etc. are contained in our
Data Book "Package Information".
Dimensions in mm
SMD = Surface Mounted Device